A PPO is actually a group of doctors and/or hospitals that provides medical service only to a specific group or association. The PPO may be sponsored by a particular insurance company, by one or more employers, or by some other type of organization. PPO physicians provide medical services to the policyholders, employees, or members of the sponsor(s) at discounted rates and may set up utilization control programs to help reduce the cost of medical care. In return, the sponsor(s) attempts to increase patient volume by creating an incentive for employees or policyholders to use the physicians and facilities within the PPO network.